CN1034650C - Elevator signal transmission device - Google Patents

Abstract

To improve the extent of efficiency by inserting an unsignaled time of more than the series signal width of one byte into a series transmission signal line to be transmitted from a master station microcomputer to a substation microcomputer at a constant period, and programming it so as to make the substation microcomputer use the unsignaled time as a synchronous data.In a diaphragm which shows a series signal being delivered between a master station microcomputer 2 of a control panel 1 in a machine room and a substation microcomputer 4 of a hall operating panel or substation microcomputer 9 of a cage operating panel in a time series manner, A, B, C, D parts are of unsignaled time and inserted into an interruption handling routine. The master station microcomputer 2 performs a job for timer interruption handling, transmitting a transmit data to the substation microcomputer 4 which detects the unsignaled times A-D by means of the timer interruption handling, using these unsignaled times as a synchronous data. Therefore any special synchronous data is no longer required and, what is more, special synchronous hardware is also unrequired, thus synchronization for the series signal transmission is easily performable.

Description

Elevator signal transmission device

The present invention relates to a signal transmission device of an elevator, in particular to a microcomputer used in a control panel (hereinafter referred to as a master microcomputer) and an elevator boarding site operating panel and a pod operating panel, etc. It is a convenient elevator signal transmission device that executes serial signal transmission occasion transmission programs, etc. in a start-stop synchronous manner between microcomputers (hereinafter referred to as sub-microcomputers).

In the past, there was also an elevator signal transmission device that performed serial signal transmission between the main station and the sub-unit in a synchronous manner, such as in Japanese Utility Model Application No. 63 (1988)-50263 and Japanese Patent Publication 63 (1988) - The device disclosed in the Publication No. 49942.

The device disclosed in Japanese Utility Model Application No. Sho 63-50263 is equipped with a master microcomputer for signal transmission on the control panel and a sub-unit microcomputer for signal transmission on the field operation panel of each floor. At the same time, the computer is also equipped with a signal transmission bus from the main microcomputer to each floor, a signal transmission branch line connected from the signal transmission bus to the sub microcomputers, and a connecting element arranged at the sending terminal of the sub microcomputers , thus forming a half-duplex transmission mode. In this kind of elevator signal transmission device, it is provided with: a contact point arranged on the above-mentioned signal transmission branch line part, and another contact point connecting the signal branch line and the power supply on the side of the sub-unit microcomputer of the contact point, and the sub-unit microcomputer for detecting that the sub-unit microcomputer is out of control. A computer out-of-control detection circuit, and a connection component failure detection circuit for detecting the connection component failure. The control of the above-mentioned two contacts is performed by the above-mentioned sub-stage microcomputer out-of-control detection circuit and the connection element failure detection circuit. According to such a structure, when the microcomputer is out of control and the connecting element for sending is faulty, it is easy to avoid affecting other sub-stations and failing to receive the signal, thereby controlling the fault within a local range.

In addition, the device disclosed in the Japanese Patent Publication No. 63 (1988)-49942 is equipped with: an elevator connected to multiple floors, a number machine control device that controls at least the motor for driving the elevator with a microcomputer, and an elevator boarding car control device. pod controls. In the elevator device that performs serial multiplex system communication through flexible leads between the control device of the above-mentioned car and the control device in the above-mentioned car, it is composed of a serial sending device and a serial receiving device, and the serial sending device will be stored in The parallel data in the data buffer memory for sending is converted into serial data, and synchronous data is added to the above serial data as a serial transmission data group, and the above transmission data group is modulated by a modulation circuit to periodically Sending; the serial receiving device demodulates the serial receiving data group containing synchronous data and received data sent through the demodulation circuit through the demodulation circuit, and demodulates the serial data group obtained by the demodulation circuit The data is converted into parallel data, and the above-mentioned parallel data is sequentially stored in the data buffer memory for receiving; the serial control device independently executing the serial multiplex system communication in the above-mentioned microcomputer is respectively installed in the above-mentioned machine control device and the above-mentioned The control device in the pod; the address bus, data bus and control bus of the microcomputer of the above-mentioned car control device are connected to the serial communication control device; and the data buffer memory for sending and receiving constitutes a part of the address space of the above-mentioned microcomputer . According to such a structure, the communication software of the microcomputer can be omitted, and the microcomputer can not be installed in the pod control device, and the flexible leads and the main wiring of the hall can be greatly reduced.

However, in the elevator signal transmission device of the start-stop synchronous method as described above, the "synchronous data" (also referred to as synchronous characters) that appears in the form of special data in the serial signal group is used to communicate between the master microcomputer and the sub-units. Synchronous transfer between microcomputers.

Now, assuming that the sending number [FF] (hexadecimal) (HEX) is used for the synchronous data, if the slave microcomputer one receives the sending number [FF], it is interpreted as synchronous data by the programming, and the transmission data Sending number [FF] cannot be used in . In addition, the sub-unit microcomputer can also be programmed to explain that only when the sending number [FF] is received at a certain mark time is interpreted as synchronous data, but this makes the processing complicated. At the same time, if the timing itself occurs due to transmission errors, etc. Chaos, and it's impossible to get in sync anymore. In addition, there are methods such as connecting the sending signal code [FF] several times, or using group codes, etc. In the former case, because the synchronization data requires multiple bytes, the transmission efficiency is reduced, and the latter must be configured to detect Problems such as the hardware of the group code.

The object of the present invention is to solve the above problems and provide an elevator signal transmission device that does not require special synchronization data and hardware, can easily obtain the synchronization of serial signal transmission, and makes efficient serial signal transmission possible.

According to the elevator signal transmission device of the present invention, in the serial transmission signal group sent from the main microcomputer to the sub microcomputer, the no-signal time above the byte serial signal amplitude is inserted with a certain cycle, and the sub microcomputer will This dead time is programmed as synchronization data. That is to say, a no-signal time is set every certain time in the transmission cycle of the master microcomputer, and the sub-microcomputer considers the data transmitted immediately after the no-signal time as the No. 1 transmission data during a transmission cycle. The device of the present invention is thus constituted.

In the present invention, the microcomputer of the main station plays the role of synchronizing data with the sub-station by inserting a no-signal time every certain time in the transmission cycle.

Fig. 1 is a block diagram showing an embodiment of the present invention,

Fig. 2 is a program block diagram of the main program of the master microcomputer,

Fig. 3 shows the transmission number table used in the timer interrupt processing of the master microcomputer,

Fig. 4 is the program block diagram of the timing interrupt processing of the master microcomputer,

Fig. 5 is a program block diagram of the main program of the sub-stage microcomputer,

Fig. 6 is the program block diagram of the timing interrupt processing of sub-stage microcomputer,

Fig. 7 is a program block diagram of sub-stage microcomputer UART receiving interrupt processing,

FIG. 8 is a diagram showing the configuration of serial signals exchanged between the master microcomputer and the slave microcomputers in time series.

Next, an embodiment of the present invention will be described in detail according to FIG. 1 to FIG. 8 .

Fig. 1 is a block diagram showing an embodiment of the present invention. Among Fig. 1, (1) is the control panel that is arranged in the elevator mechanism room of building roof, (2) is to be arranged in the control panel (1), and it is equipped with the serial signal transmission interface (hereinafter referred to as UART) and Timer and dozens of parallel ports of the master office microcomputer, (3) is set in the control panel (1), and UART is added in the master microcomputer (2), (4) is set in the elevator scene In the operation panel, like the master microcomputer, there are UARTs, timers, and dozens of parallel ports in the sub-stage microcomputer of the elevator scene. (5) is the indicator of the elevator scene, and (6) is the display The on-site call button lamp for on-site calls, (7) is the on-site call button for registering on-site calls, and the call button lamp (6) and the call button (7) have two upward and downward directions, here The omission shown in the figure is one. (8) is the gondola of elevator, (9) is to be arranged in the gondola (8), and the gondola side sub-unit microcomputer of UART and timer and dozens of parallel ports are housed equally with main platform microcomputer, ( 10) is the car operation panel arranged in the car (8), which contains the destination floor registration button, registration lamp and door switch button, etc. not shown in the figure. (11) is the indicator of pod, and (12), (13) are respectively the serial signal transmission line, the receiving line from main platform microcomputer (2) to the side sub-platform microcomputer (4) of the elevator scene, control The signal transmission between the board (10) and the boarding site is performed by using these sending lines (12) and receiving lines (13). (14), (15) are respectively from UART (3) to the serial signal transmission line of the sub-stage microcomputer (9) of the pod side, the receiving line, between the control panel (1) and the pod (8) Signal transmission is performed using these sending lines (14) and receiving lines (15).

Fig. 2-Fig. 4 is in the present embodiment, represents the program of main platform microcomputer (2), Fig. 2 is the program block diagram of the main program of main platform microcomputer, Fig. 3 is the sending number table used in the timer interruption process, Fig. 4 is a block diagram of timer interrupt processing.

Fig. 5-Fig. 7 is in the present embodiment, example shows the program of sub-stage microcomputer (4), Fig. 5 is the program frame of main program, Fig. 6 is the program block diagram of timer interrupt processing, Fig. 7 is UART reception interrupt processing program block diagram.

Fig. 8 is a diagram showing the structure of handover serial signals in time series between the master microcomputer (2) and the slave microcomputer (4) or (9) in this embodiment.

Next, the operation of the signal transmission device shown in FIG. 1 will be described with reference to FIGS. 2 to 8 . The main stage microcomputer (2) carries out main processing according to the program of Fig. 2 at first. That is, initial setting is performed at step (31), and serial port setting is performed at step (32). At step (33) set the timer interrupt to 2.5 microseconds. In step (34), the floor counter (not shown) is cleared to 0. A timer (not shown) is started at step (35). Interrupt permission is performed at step (36), and interrupt waiting is performed at step (37).

Next, parts A, B, C, and D shown in FIG. 8 are inserted into the timer interrupt processing shown in FIG. 4 as the no-signal time. That is, in the timing interrupt processing, when extracting the transmission number FF of the transmission number table shown in FIG. Insert no-signal time B among Fig. 8 during FF (22), insert no-signal time C among Fig. 8 when extracting insertion number FF (23), insert no-signal time D among Fig. 8 when extracting sending number (24). Also, the host microcomputer (2) executes interrupt processing according to the program of FIG. 4 . That is, at step (41), the transmission number is extracted from the transmission code table using the value of the floor counter as an offset. In step (42) judge whether to send number FF, if obtain affirmative result in step (43) with sending signal code as offset, extract sending data from sending data RAM (figure not shown), in step (44) send to Sub-table microcomputer (4), advances to step (45). If a negative result is obtained in step (42), then proceed to step (45). Retrieve the return information from the sub microcomputer (4) at step (45). Whether the value of floor counter is judged to be 13 (HEX) in step (46), if what obtain is affirmative result, floor counter is cleared and set 0 in step (47) and return to main program, if what obtain is negative result in step (48) ) increments the floor counter and returns to the main program. In addition, the slave microcomputer (4) first executes the main processing program according to the program in Fig. 5 . That is, initial setting is performed at step 51, and serial port setting is performed at step (52). In step (53) the receiving interrupt counter (not shown) is cleared to 0, in step (54) the timer interrupt is set to 2.5 microseconds, in step (55) the timer counter (not shown) Set to 2. A timer (not shown) is started at step (56). Execute interrupt permission at step (57), and wait for interrupt at step (58).

Then, the slave microcomputer (4) detects the above-mentioned dead time ABCD (FIG. 8) through the timer interrupt processing in FIG. 6. That is, in Fig. 6, by step (61) the receiving interrupt counter is cleared and set to 0, in step (62) removes the sign that no signal detection is complete, in step (63) timer interrupt counter is decremented, in step (64) Determine whether the value of the timer interrupt counter is 0. If get affirmative result then in step (65) set up the sign that there is no signal detection and return, if get negative result just return as it is. That is, while setting the value of the timer interrupt counter to 2 in the main process of FIG. 5 as described above, it is set to 2 in the UART reception interrupt process of FIG. 7 described later. In addition, the reception interrupt processing is performed according to the procedure shown in FIG. 7 . That is, the timer interrupt counter is reset to 2 at step (71), and the timer is reset to 2.5 microseconds at step (72), and then restarted. In step (73) judge whether to set up the sign that no signal detection is completed, if get negative result, just give it back, if get affirmative result, just take out the data from sending data RAM with the value of receiving interrupt counter as offset, in step (75) Send the fetched data. In step (76), receive the value of the interrupt counter as the offset and store the received data in the received data RAM (not shown). In step (77) judge whether the value of receiving interrupt counter is 0F, if get affirmative result, make receiving interrupt counter clear and put 0 and return in step (78), if get negative result then in step (79) to receive interrupt counter increment Then return.

In this way, in the timer interrupt processing of FIG. 6, when the counter is decremented and becomes 0 (the timer interrupt does not become 0 unless the timer interrupt is entered twice consecutively). That is, only when the UART has not received an interrupt for more than 5 microseconds, the no-signal detection completion flag is set, and the first receiving and sending process is started from the following UART receiving interrupt, thereby obtaining synchronization. Then, the sub-station microcomputer (4) regards the transmission data coming immediately after the no-signal time as the No. 1 data in 1 transmission cycle.

In addition, in the above-mentioned embodiment, the situation of the main platform microcomputer (2) and the sub-platform microcomputer (4) has been described, certainly, the situation of the main platform microcomputer (2) and the sub-platform microcomputer (9) is in execution are all the same.

As described in detail above, the present invention inserts a no-signal time above the serial signal amplitude of 1 byte in a certain cycle when the serial transmission signal is sent from the main station to the sub-station, because the sub-station microcomputer interprets the no-signal time Time is used as synchronous data, so there is no need for synchronous data in a specific form, and no special hardware for synchronization is required, so that the synchronization of serial signal transmission can be easily obtained, and the reduction of transmission efficiency can be prevented to a minimum. The effect of high-efficiency serial signal transmission is achieved.

Claims (2)

1. A kind of elevator signal transmission device, in order to transmit two-way start-stop synchronous type serial signal between control panel and each layer take elevator scene machine and pod machine, it is characterized in that, it has: The microcomputer located in the control panel of the mechanical room operates as the master station for transmitting signals, and is used to control the transmission of serial signals, and has an insertion device for controlling the microcomputers from the master station at a certain period. A non-transmission period in which the serial signal is inserted into the sequence of the serial transmission signal sent by the computer to the pod with a width of 1 byte or more; The microcomputers installed on the elevators on each floor act as sub-stations for transmitting signals, and are used to control the transmission of serial signals and control the buttons on the elevators, etc., and have synchronous signal detection means to The period when the microcomputer of the above-mentioned main station does not transmit a signal is judged as a synchronous signal; The microcomputer installed in the gondola acts as a sub-station for transmitting signals to control the transmission of serial signals and control the pod machine, and has a synchronous signal detection means to prevent the microcomputer of the master station from transmitting The period of the signal is judged as a synchronous signal. 2. Elevator signal transmission device as claimed in claim 1, it is characterized in that, the synchronous signal detecting means that the period that the microcomputer of master platform does not transmit signal is judged as synchronous signal is by being installed in the microcomputer of sub-platform The interrupt signal issued by the timing device.

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